Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
A. Powder metallurgy
B. Casting
C. Forging
D. None of these
Answer: Option C
A. Powder metallurgy
B. Casting
C. Forging
D. None of these
Answer: Option C
Which of the following will resist maxi-mum shock & vibration without cracking?
A. Grey cast iron
B. White cast iron
C. Malleable iron
D. Graphite
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
Isotropic materials have the same __________ in all directions.
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties
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